#ifndef MO_REGISTER_FILEREGISTERFWD_INCLUDED
#define MO_REGISTER_FILEREGISTERFWD_INCLUDED

class DirectoryRefreshProgress;

namespace MOShared
{

struct DirectoryEntryFileKey
{
  DirectoryEntryFileKey(std::wstring v)
    : value(std::move(v)), hash(getHash(value))
  {
  }

  bool operator==(const DirectoryEntryFileKey& o) const
  {
    return (value == o.value);
  }

  static std::size_t getHash(const std::wstring& value)
  {
    return std::hash<std::wstring>()(value);
  }

  std::wstring value;
  const std::size_t hash;
};


class DirectoryEntry;
class OriginConnection;
class FileRegister;
class FilesOrigin;
class FileEntry;
struct DirectoryStats;

using FileEntryPtr = boost::shared_ptr<FileEntry>;
using FileIndex = unsigned int;
using OriginID = int;

constexpr FileIndex InvalidFileIndex = UINT_MAX;
constexpr OriginID InvalidOriginID = -1;

// if a file is in an archive, name is the name of the bsa and order
// is the order of the associated plugin in the plugins list
// is a file is not in an archive, archiveName is empty and order is usually
// -1
class DataArchiveOrigin
{
  std::wstring name_ = L"";
  int order_ = -1;
  
public:

  int order() const { return order_; }
  const std::wstring& name() const { return name_; }
  
  bool isValid() const {
    return name_.size() > 0;
  }

  DataArchiveOrigin(std::wstring name, int order)
    : name_(std::move(name)), order_(order) {}

  DataArchiveOrigin() = default;
};

class FileAlternative
{
  OriginID originID_ = -1;
  DataArchiveOrigin archive_;

public:

  OriginID originID() const { return originID_; }
  const DataArchiveOrigin& archive() const { return archive_; }

  bool isFromArchive() const {
    return archive_.isValid();
  }

  FileAlternative() = default;

  FileAlternative(OriginID originID, DataArchiveOrigin archive) 
    : originID_(originID), archive_(std::move(archive)) {}
};

using AlternativesVector = std::vector<FileAlternative>;

struct DirectoryStats
{
  static constexpr bool EnableInstrumentation = false;

  std::string mod;

  std::chrono::nanoseconds dirTimes;
  std::chrono::nanoseconds fileTimes;
  std::chrono::nanoseconds sortTimes;

  std::chrono::nanoseconds subdirLookupTimes;
  std::chrono::nanoseconds addDirectoryTimes;

  std::chrono::nanoseconds filesLookupTimes;
  std::chrono::nanoseconds addFileTimes;
  std::chrono::nanoseconds addOriginToFileTimes;
  std::chrono::nanoseconds addFileToOriginTimes;
  std::chrono::nanoseconds addFileToRegisterTimes;

  int64_t originExists;
  int64_t originCreate;
  int64_t originsNeededEnabled;

  int64_t subdirExists;
  int64_t subdirCreate;

  int64_t fileExists;
  int64_t fileCreate;
  int64_t filesInsertedInRegister;
  int64_t filesAssignedInRegister;

  DirectoryStats();

  DirectoryStats& operator+=(const DirectoryStats& o);

  static std::string csvHeader();
  std::string toCsv() const;
};

} // namespace

#endif // MO_REGISTER_FILEREGISTERFWD_INCLUDED
